Home / 21,668.21-29,899.72-12,236.77

Finding the Fourth Proportional to 21,668.21, 29,899.72 and 12,236.77

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Solution

The fourth proportional to 21,668.21, 29,899.72 and 12,236.77 is: 16,885.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,668.21 : 29,899.72 = 12,236.77 : x
  2. Step 2: Convert to fraction form
    21,668.21/29,899.72 = 12,236.77/x
  3. Step 3: Cross multiply
    21,668.21x = 29,899.72 × 12,236.77
  4. Step 4: Simplify right side
    21,668.21x = 365,875,786.02
  5. Step 5: Solve for x
    x = 365,875,786.02/21,668.21
  6. Step 6: Final answer
    x = 16,885.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.